/**
 * projectName:  
 * fileName:  
 * packageName:  
 * date: 
 * copyright(c)
 */
package cn.itcast.interceptor;

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @title: CorsFilter.java
 * @package com.job.filter
 * @description: TODO
 * @author: 欧阳辉
 * @date: 2019年3月29日 下午2:42:32 
 * @version: V1.0
 */
@Slf4j
@Component
@WebFilter(urlPatterns = "/webapi/*", filterName = "CorsFilter")
public class CorsFilter implements Filter {



    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }


    /**
     * @title: doFilter
     * @description: TODO
     * @param servletRequest
     * @param servletResponse
     * @param filterChain
     * @throws IOException
     * @throws ServletException
     * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
     */
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
            throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        HttpServletRequest request = (HttpServletRequest)servletRequest;

        log.debug("跨域请求过滤器");
        String origin = request.getHeader("Origin");
        response.setHeader("Access-Control-Allow-Origin", origin);
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "Content-Type,XFILENAME,XFILECATEGORY,XFILESIZE,token");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("P3P", "CP='IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi " +
                "" +
                "" +
                "" +
                "" +
                "" +
                "HIS OUR IND CNT'");

        String method = request.getMethod();
        if(method.equalsIgnoreCase("OPTIONS")){
            servletResponse.getOutputStream().write("Success".getBytes("utf-8"));
        }else{
            filterChain.doFilter(servletRequest, servletResponse);
        }
    }

    @Override
    public void destroy() {


    }

}
